Reduction gear



FIG. 1 is a first perspective view of a reduction gear;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof, the opposite side being a mirror image of the side shown herein;

FIG. 6 is a top view thereof, the opposite side being a mirror image of the side shown herein;

FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG. 3 thereof, in which the internal mechanism is omitted; and,

FIG. 8 is an enlarged cross-sectional view taken along line 8-8 in FIG. 3 thereof, in which the internal mechanism is omitted.

The broken lines depict portions of the reduction gear in which the design is embodied that are not considered part of the claimed design. 

CLAIM The ornamental design for a reduction gear, as shown and described. 